JP4710690B2 - Lighting equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting fixture which can individually control luminance intensity and color temperatures of the light to be irradiated and can control wide range of lighting. <P>SOLUTION: The lighting fixture 1 is provided with a light control circuit part 2 to control light of a light source 6 consisting of an incandescent lamp, a liquid crystal filter part 3 which is formed using nematic liquid crystal having dichroic coloring matter and is arranged on an optical axis of the light source 6, and in which the transmissivity of light of a prescribed color temperature changes according to the impressing voltage, a color control circuit part 4 which controls AC voltage to impress on the liquid crystal filter part 3, and a lighting control part 5 which has a control part 5b to control the light control circuit part 2 and the color control circuit part 4 according to a storage part 5b in which lighting program is stored and the lighting program stored in the storage part 5b. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  The present invention relates to a lighting device.

  2. Description of the Related Art Conventionally, there has been provided a lighting device that awakens a sleeping person by light stimulation (for example, Patent Document 1). As shown in FIG. 15, such an illuminating device 100 includes a light emitting unit 101 that can generate light of at least three types of illuminance, that is, low illuminance light, medium illuminance light, and high illuminance light. A dimmer 102 for dimming each illuminating light emitted, a control device 103 formed by a microcomputer, a clock circuit 104, an external storage device 105 storing an illuminance change pattern, and the current time and wake-up setting Display unit 106 for displaying time and function, operation unit 107 for inputting desired wake-up time, correction of current time, input of illuminance adjustment, sound stimulus generation unit 108 for generating sound stimulus, and power failure detection A circuit 109 and a power supply circuit 110 are provided.

And if this illuminating device 100 inputs wake-up desired time, the control apparatus 103 will be low illumination light from the light emission part 101 at the time of 30 to 60 minutes before wake-up desired time by comparison with the present time and wake-up desired time. And the illuminance is gradually increased from a state of approximately 0 lx to about 200 lx via the dimming unit 102, and the control device 103 causes the light emitting unit 101 to enter the light emitting unit 101 at a time 5 to 10 minutes before the desired wake-up time. The illuminance light is output, and the light from the light emitting unit 101 is switched from the medium illuminance light to the high illuminance light with double or more brightness at the desired wake-up time or immediately before (within 1 minute before). It is configured as follows.
JP-A-7-318670 (see paragraph numbers [0018] to [0022] and FIGS. 1 and 2)

  In such a conventional lighting device 100, the state before dawn with low illuminance light, the state before and after dawn with medium illuminance light, and the state where there is solar radiation after dawn with high illuminance light, the illuminance is simply reduced. Instead of gradually increasing, as described above, gradually increase from low illuminance to medium illuminance, and then change the illuminance rapidly from medium illuminance to high illuminance that is more than doubled. The purpose of this study is to provide the state of light in the natural world from before dawn to before and after dawn, and the state of being directly exposed to sunlight, thereby awakening without discomfort to the sleeper.

  However, since the color temperature of the natural light actually changes depending on the time zone, simply adjusting the illuminance is insufficient to reproduce the natural light.

  The present invention has been made in view of the above points, and an object of the present invention is to provide an illuminating device that can individually control the light intensity and color temperature of light to be irradiated and can perform wide illumination control.

In order to solve the above-mentioned problem, in the invention of the illumination device according to claim 1, the light source is formed by using a dimming circuit unit for dimming control of the light source and a nematic liquid crystal having a dichroic dye, and A liquid crystal filter unit disposed on the optical axis and changing the transmittance of light of a predetermined color temperature in accordance with an applied AC voltage; a toning circuit unit for controlling the AC voltage applied to the liquid crystal filter unit; and a lighting control unit for controlling the dimming circuit part and the toning circuit unit according to a preset lighting program, the illumination program, wherein the light source color temperature of light emitted is controlled by the lighting program The dimming circuit unit and the toning circuit unit so that the light intensity of the light source and the transmittance of the liquid crystal filter unit with respect to light having a low color temperature are inversely proportional when the color temperature is low. Control Characterized in that it is a program.

In the invention of the lighting device according to the second aspect, the light control circuit part for light control of the light source and the nematic liquid crystal having the dichroic dye are formed and disposed on the optical axis of the light source. A liquid crystal filter section in which the transmittance of light having a predetermined color temperature changes in accordance with an alternating voltage to be applied; a toning circuit section for controlling the alternating voltage applied to the liquid crystal filter section; and the adjustment according to a preset illumination program. and a lighting control unit for controlling the optical circuit section and the toning circuit section, the illumination program, a color temperature of the light the light source radiation is so high within the range of color temperature to be controlled by the lighting program characterized in some cases, the intensity of the light source, said such that transmittance of the liquid crystal filter section proportional to the color temperature for the high light, that is a program for controlling the dimming circuit part and the toning circuit section When That.

In the invention of the lighting device according to claim 3, in addition to the configuration of claim 1 or 2, wherein the liquid crystal filter unit, a high illuminance for a liquid crystal filter that color temperature is configured to transmittance changes for low light And a low illuminance liquid crystal filter configured to change transmittance with respect to light having a high color temperature.

  The lighting device according to claim 1 can individually control the light intensity and the color temperature of the light to be irradiated. For example, the light intensity and the color temperature of the light irradiated at the time of going to bed are lowered, and the light irradiated at the time of waking up. Illumination programs that increase the luminous intensity and color temperature of the light can be made, and this brings about an effect that a wide range of illumination control can be performed.

In addition, when the luminous intensity of the light source is lowered, the color temperature of the light irradiated by the illumination device is lowered, and when the luminous intensity of the light source is increased, the color temperature of the light emitted by the illumination device can be increased. As a result, the color temperature of the light emitted from the illumination device can be changed over a wide range even when a light source having a low color temperature within the range of the color temperature controlled by the illumination program is used. Play.

The invention of the lighting device according to claim 2 can individually control the light intensity and the color temperature of the light to be irradiated. For example, the light intensity and the color temperature of the light irradiated at the time of going to bed are lowered, and the light irradiated at the time of waking up. Illumination programs that increase the luminous intensity and color temperature of the light can be made, and this brings about an effect that a wide range of illumination control can be performed. In addition, when the luminous intensity of the light source is lowered, the color temperature of the light irradiated by the illumination device is lowered, and when the luminous intensity of the light source is increased, the color temperature of the light emitted by the illumination device can be increased. As a result, even when a light source having a high color temperature within the range of the color temperature controlled by the illumination program is used, the color temperature of the light emitted by the illumination device can be changed over a wide range. Play.

The invention of the lighting device according to claim 3 has an effect that the color temperature of the light irradiated by the lighting device can be changed in a wide range with the color temperature peculiar to the light source as the center.

  Hereinafter, an embodiment of a lighting device of the present invention will be described with reference to FIGS.

(Embodiment 1)
The illuminating device 1 of this embodiment has a function as a wake-up device, and as shown in FIG. 1, a dimming circuit unit 2 for dimming control of a light source 6 such as an incandescent lamp (incandescent light bulb) and the like. It is formed using a nematic liquid crystal having a dichroic dye and is arranged on the optical axis of the light source 6 and has a predetermined color temperature according to an applied voltage (alternating voltage) (in this embodiment, mainly a color). A liquid crystal filter unit 3 having a low temperature, that is, a transmittance of light having a long wavelength in the visible region), a toning circuit unit 4 for controlling an AC voltage applied to the liquid crystal filter unit 3, and a preset illumination. And a lighting control unit 5 that controls the light control circuit unit 2 and the color control circuit unit 4 according to a program. The circuit configurations of the dimming circuit unit 2 and the toning circuit unit 4 can be conventionally well-known, and thus detailed description thereof is omitted.

  As shown in FIG. 2, the dimming circuit unit 2 includes a triac (three-terminal bidirectional thyristor) Q1 connected in series to an AC power supply AC such as a commercial power supply connected in series and a light source 6, and the triac Q1 And an AC power source AC are provided with an inductor L1 for preventing noise, and a capacitor C1 for preventing noise is connected in parallel to the AC power source AC. A parallel circuit composed of a capacitor C2 and a resistor R1 is connected between the connection point of the triac Q1 and the inductor L1 and the gate of the triac Q1, and a transistor (PNP transistor) is connected to the gate of the triac Q1. The emitter of Q2 is connected. The collector of the transistor Q2 is connected to the ground through a resistor R2, and the base of the transistor Q2 is connected to an input terminal IN to which a dimming control signal S1, which will be described later, consisting of a pulse signal is input, and a resistor It is connected to the emitter via R3.

  According to the light control circuit unit 2 configured as described above, the time when the triac Q1 is turned on by changing the on-duty of the control signal S1 input to the input terminal IN (that is, by adjusting the duty ratio). Thus, it is possible to perform the dimming control of the light source 6 by controlling the time for supplying power from the AC power source AC to the light source 6.

  The liquid crystal filter unit 3 is a blue liquid crystal formed by using a nematic liquid crystal having a dichroic dye that absorbs light of a long wavelength and increases a color temperature as a dichroic dye whose light absorptance changes depending on molecular orientation. It is a filter. As shown in FIG. 3A, such a liquid crystal filter unit 3 is a liquid crystal layer in which a nematic liquid crystal 3b mixed with a dichroic dye 3a is dispersed in a transparent resin (acrylic resin, epoxy resin, etc.) 3c. 3d is obtained by sandwiching a pair of transparent substrates (a glass substrate or a transparent plastic substrate) 3f having transparent electrodes (ITO or the like) 3e formed on opposite surfaces to form an element. Further, a polyimide alignment film (not shown) rubbed (rubbed) with a roll with nylon fibers is provided on the surface of the transparent electrode 3e in order to align the liquid crystal molecules of the nematic liquid crystal 3b in a desired direction. Yes. Here, as the nematic liquid crystal 3b, for example, it is desirable to use a chemically stable and excellent light resistance such as a cyano biphenyl type or a cyclohexane type. Further, as the dichroic dye 3a that absorbs light of a long wavelength and increases the color temperature, it is desirable to have solubility in the nematic liquid crystal 3b. For example, an anthraquinone dye is suitable.

  Hereinafter, the transmittance characteristics of the liquid crystal filter unit 3 will be described with reference to FIG. First, when no AC voltage is applied to the liquid crystal filter unit 3, the dye molecules of the dichroic dye are aligned parallel to the incident polarized light together with the liquid crystal molecules of the nematic liquid crystal (homogeneous alignment). Since the axis of the dye molecule is parallel to the polarized light, it absorbs light having a long wavelength according to the characteristics of the dichroic dye as shown by a graph B1 in FIG. When an alternating voltage is applied to the liquid crystal filter section 3 from this state, the dye molecules are aligned with the liquid crystal molecules in the direction of the electric field and absorption is eliminated. As a result, as shown by the graph B2 in FIG. When the absorptance with respect to light decreases (in other words, the transmittance increases) and the voltage value of the AC voltage applied to the liquid crystal filter unit 3 becomes equal to or higher than a predetermined value, a graph B3 in FIG. As described above, light of a long wavelength is hardly absorbed and has a transmittance of about 100% for light of almost all wavelengths.

On the other hand, when an alternating voltage having a voltage value of about 15 V or more and a frequency of several hundred Hz to several kHz is applied to the liquid crystal filter unit 3, for example, the time during which the dye molecules can be sufficiently aligned in the electric field direction together with the liquid crystal molecules Therefore, the light absorptance decreases, and as shown by a graph B3 in FIG. 3B, light of a long wavelength is hardly absorbed. When the frequency of the AC voltage is increased from this state, the time for which the AC voltage is continuously applied decreases, so that the dye molecules are not sufficiently oriented in the electric field direction, resulting in an increase in light absorption. (In other words, the transmittance decreases), and when the frequency reaches about several kHz to several hundred kHz, most of the long-wavelength light is absorbed as shown by the graph B1 in FIG. As described above, the liquid crystal filter unit 3 has a light absorption rate (light transmittance) that varies depending on the magnitude of the voltage value of the applied AC voltage and the level of the frequency of the AC voltage. It is. Specifically, if the voltage value of the applied AC voltage is large, the liquid crystal filter unit 3 has a reduced absorption factor for light having a long wavelength (increases transmittance), and the voltage value of the applied AC voltage is If the frequency is small, the absorptance for long wavelength light increases (the transmittance decreases), and if the frequency of the applied AC voltage is high, the absorptance for long wavelength light increases (the transmittance increases). ) If the frequency of the applied AC voltage is low, the absorptance with respect to light having a long wavelength decreases (the transmittance increases).

  The toning circuit unit 4 is for adjusting the transmittance (absorption rate) of the liquid crystal filter unit 3 by applying an AC voltage having a predetermined voltage value and frequency to the liquid crystal filter unit 3. As shown, a power supply circuit 4a that generates a DC power supply of a predetermined voltage based on an AC power supply AC such as a commercial power supply, and an inverter circuit 4b that generates an AC power supply of a predetermined frequency based on the DC power supply generated by the power supply circuit 4a. It consists of and.

  As shown in FIG. 4, the power supply circuit 4a has a transformer TR1 in which a primary winding N1 is interposed between both ends of an AC power supply AC such as a commercial power supply, and both ends of a secondary winding N2 of the transformer TR1. It has a diode bridge DB1 connected to the terminals and a noise prevention capacitor C3 connected between the output terminals of the diode bridge DB1. A step-down chopper circuit BC including a switching element Q3, an inductor L2, and a diode D1 is connected between both ends of the capacitor C3. An electrolytic capacitor C4 is connected between output terminals of the step-down chopper circuit BC. Has been. Further, the power supply circuit 4a includes a switching control unit SC1 that performs on / off control of the switching element Q3 of the step-down chopper circuit BC in accordance with a later-described first toning control signal S2 output from the illumination control unit 5. .

  According to such a power supply circuit 4a, the output voltage of the step-down chopper circuit BC can be set to a desired value by adjusting the on-duty of the switching element Q3 by the switching control unit SC1, and this step-down chopper circuit BC Is the voltage value of the AC voltage applied to the liquid crystal filter unit 3.

  On the other hand, as shown in FIG. 5A, for example, the inverter circuit 4b is connected in parallel to a series circuit of switching elements Q4 and Q5 connected in parallel to the electrolytic capacitor C4 and a series circuit of switching elements Q4 and Q5. Switching for controlling on / off of each switching element Q4, Q5 in accordance with a series circuit of capacitors C5, C6, an inductor L3 having one end connected to the connection point of the switching elements Q4, Q5, and a control signal S3 for toning described later This is a so-called half-bridge type inverter circuit having a control unit SC2, and the liquid crystal filter unit 3 is interposed between the other end of the inductor L3 and the connection point of the capacitors C5 and C6.

  According to such an inverter circuit 4b, it is possible to adjust the frequency level of the AC voltage applied to the liquid crystal filter unit 3 by controlling the switching timing of switching on and off of the switching elements Q4 and Q5 by the switching control unit SC2. It can be done.

  By the way, the inverter circuit for the liquid crystal filter section 3 is not limited to the one shown in FIG. 5A, and for example, an inverter circuit 4c as shown in FIG. 5B may be used.

  Here, the inverter circuit 4c shown in FIG. 5B includes a series circuit of switching elements Q6 and Q7 connected in parallel to the electrolytic capacitor C4 and a series of switching elements Q8 and Q9 connected in parallel to the series circuit. This is a so-called full-bridge inverter circuit having a circuit, an inductor L4 having one end connected to a connection point between the switching elements Q6 and Q7, and a switching control unit SC3 that controls on / off of the switching elements Q6 to Q9. The liquid crystal filter unit 3 is interposed between the other end of the switch and the connection point of the switching elements Q8 and Q9.

  According to such an inverter circuit 4c, similarly to the inverter circuit 4b shown in FIG. 5A, the switching control unit SC3 controls the timing for switching on / off of the switching elements Q6 to Q9, whereby the liquid crystal filter unit 3 The frequency level of the AC voltage applied to can be adjusted.

  Therefore, according to the toning circuit unit 4 as described above, the transmittance of the liquid crystal filter unit 3 is set to a desired value by adjusting the voltage value and frequency of the AC voltage applied to the liquid crystal filter unit 3. Can do.

  As shown in FIG. 1, the illumination control unit 5 includes a control unit 5a composed of a microcomputer or the like, a storage unit 5b in which an illumination program that is a program for dimming and toning control of the lighting device 1, and a crystal A clock unit 5c that counts time using a vibrator (not shown), a display unit 5d for displaying various functions such as display of the current time and wake-up set time, correction of the current time, And an operation unit 5e for inputting the set-up time and the like. Here, since the clock unit 5c, the display unit 5d, and the operation unit 5e are well-known ones as used in the conventional alarm device, the description thereof is omitted.

  In accordance with the illumination program stored in the storage unit 5b, the control unit 5a supplies the light control circuit S2 with the light control signal S1 including the above-described pulse signal, and supplies the color control circuit unit 4 with the control signal for color adjustment. A dimming circuit unit that outputs S2 and S3 and outputs control signals S1 to S3 according to an input of the operation unit 5e and an automatic control function for controlling the dimming circuit unit 2 and the toning circuit unit 4, respectively. 2 and a manual control function for controlling the toning circuit unit 4. In addition, the control unit 5a sets and corrects the current time (current time) according to the input of the operation unit 5e, and also counts the current time according to the clock unit 5c, and displays the current time on the display unit 5d. It has functions necessary for an alarm device, such as a function to display and a function to set and correct a wake-up time in accordance with an input from the operation unit 5e.

  The storage unit 5b is a storage device such as a RAM, and stores a lighting program for controlling the dimming circuit unit 2 and the toning circuit unit 4 by the control unit 5a. Here, as an example of the lighting program, there is a wake-up program for waking up a sleeping person by light stimulation. For example, a person (sleeping person) is irradiated with light irradiated by the lighting device 1 (hereinafter, abbreviated as “irradiating light”). By controlling the illuminance at the time of illuminating and the color temperature of the irradiated light, the sleeper is awakened quickly by irradiating the sleeper with light close to natural light. .

  For example, this wake-up program has both the illuminance when illuminating the sleeping person with the irradiation light and the color temperature of the irradiation light before the wake-up time (or the time just before one minute before that) input by the operation unit 5e. By lowering it, it induces the sleeper to feel the atmosphere of the natural world in the morning, so that the sleep is shallow, and after wakeup time, both the illuminance when illuminating the sleeper with the irradiation light and the color temperature of the irradiation light are both By raising the height, the sleeper is urged to wake up.

  Hereinafter, such a wake-up program will be described in more detail. As shown in FIG. 6A, this wake-up program is a predetermined time (for example, 30 minutes to 30 minutes before the time t3 that is the wake-up time (or the time just before one minute before that) input by the operation unit 5e. 60 minutes before) t1 to a time t2 a predetermined time before the time t3 (for example, 5 minutes to 10 minutes before) and a medium illuminance that is a period from the time t2 to the time t3 The operation of the lighting device 1 (the operation of the control unit 5a) is controlled in three periods, a period T2 and a high illuminance period T3, which is a period from the time t3 to a predetermined time (for example, the operation end time of the wake-up program). Thus, the illuminance due to the irradiation light is changed as indicated by a in FIG. 6A, and the color temperature of the irradiation light is changed as indicated by b in FIG. 6A. .

  Here, the low illuminance period T1 is a period for causing the sleeper to feel the morning atmosphere in the morning before and after sunrise (dawn) by the lighting device 1, and the wake-up program counts the current time counted using the clock unit 5c. At time t1, the control unit 5a outputs a control signal S1 to start lighting the light source 6, and thereafter, at time t2, until the illuminance by the irradiated light becomes Lx1 (for example, 250 lx or less), The control signal S1 is output to the control unit 5a so as to gradually increase the luminous intensity. Further, in the low illumination period T1, in order to produce light before and after sunrise, for example, about 40 minutes after sunrise to 1 hour after sunrise, the wake-up program gradually increases the color temperature of the irradiation light. The control unit 5a is caused to output the control signals S2 and S3 so that the color temperature is set to 3000K at t1 and the color temperature is gradually increased to set the color temperature to 4000K at time t2.

  By the way, the light source 6 used in this embodiment is an incandescent lamp whose color temperature of emitted light is 3000 K as shown in FIG. 6B, and within the range of the color temperature controlled by the wake-up program that is an illumination program. Since it is low (the lowest value within the range of the color temperature controlled by the wake-up program, which is a lighting program), the wake-up program is inversely proportional to the light intensity of the light source 6 and the transmittance of the liquid crystal filter unit 3 with respect to light having a low color temperature. Thus, the light control circuit unit 2 and the color adjustment circuit unit 4 are set to be controlled. Accordingly, the liquid crystal filter unit 3 is controlled so that the transmittance becomes maximum at time t1 and gradually decreases as time approaches t2.

  The medium illuminance period T2 is a period for letting the sleeper feel the natural atmosphere in the morning after sunrise. The wake-up program determines the luminous intensity of the light source 6 until the illuminance by the irradiated light becomes Lx2 (for example, about 500 lx to 1000 lx). The control unit 5a is caused to output the control signal S1 so as to increase the value. In the middle illuminance period T2, the wake-up program controls the control unit 5a to maintain the color temperature set in the low illuminance period T1, that is, to maintain the state where the color temperature of the irradiation light is 4000K. S2 and S3 are output. Therefore, the transmittance of the liquid crystal filter unit 3 is kept substantially constant during the medium illuminance period T2.

  The high illuminance period T3 is a period for causing a person to feel the natural atmosphere from sunrise to noon, that is, after the sunrise, and the wakeup program sets the illuminance by irradiation light to Lx3 (for example, 2000 lx or more). The controller 5a is caused to output a control signal S1 so that the luminous intensity of the light source 6 is increased until it becomes. In addition, in the high illumination period T3, the wake-up program gradually increases the color temperature of the irradiation light in order to produce light at about 3:00 pm. Specifically, the color temperature of the irradiation light becomes 5000K or higher. Then, the control unit 5a outputs control signals S2 and S3. Accordingly, in the high illuminance period T3, the transmittance of the liquid crystal filter unit 3 is reduced as compared with that in the medium illuminance period T2.

  After the high illuminance period T3, the wake-up program ends its operation, and the light source 6 is turned off.

  Therefore, according to the wake-up program described above, the illuminating device 1 irradiates the sleeping person with irradiation light having a low light output and color temperature in the low illuminance period T1, as shown in FIG. The sleeper feels an atmosphere close to the natural world, and encourages the sleeper to sleep shallowly in the subsequent medium illuminance period T2, and the light output and color temperature are high in the subsequent high illuminance period T3. By irradiating the sleeper, the sleeper is urged to wake up. This makes it possible for the sleeping person to smoothly wake up in the morning. In addition, unlike a wake-up device that awakens a sleeper by a general sound stimulus, the sleeper is awakened without ringing an harsh sound, so that it is possible to suppress giving a person discomfort when getting up. In addition, although the apparatus for generating a sound stimulus may be attached to the illuminating device 1 of this embodiment, even if it is in this case, by awakening the sleeper by the light stimulus, Discomfort can be suppressed.

  Note that the lighting program is not limited to the above-described wake-up program, and may be a sleeping program that lowers the color temperature together with the light intensity of the light source 6, or according to the time zone (for example, FIG. By changing the color temperature of the irradiation light (based on the time zone and color temperature information as shown in FIG. 6 (b)), it is possible to make a person feel the natural atmosphere, and further, as desired. The lighting program may be freely set so as to obtain the following lighting. This also applies to other embodiments described later.

  The lighting device 1 is composed of the light control circuit unit 2, the liquid crystal filter unit 3, the color control circuit unit 4, and the illumination control unit 5 described above.

  According to the illumination device 1 of the present embodiment, the light intensity (brightness) of the light source 6 can be set to a desired value by the dimming circuit unit 2, and the liquid crystal filter unit 3 can be set by the toning circuit unit 4. Since the color temperature of the irradiated light can be set to a desired value by adjusting the transmittance, it becomes possible to individually control the illuminance when illuminating a person with the irradiated light and the color temperature of the irradiated light, For example, it is possible to perform control such that the illuminance and color temperature are lowered at bedtime and the illuminance and color temperature are increased when waking up. As a result, a wide range of illumination control can be performed. Moreover, according to the illuminating device 1, since the illumination intensity and color temperature at the time of illuminating a person with irradiation light can be individually controlled as described above, the wake-up time (or the wake-up time) input by the operation unit 5e according to the wake-up program described above. Before 1 minute), the illuminance when illuminating the sleeping person with the irradiation light and the color temperature of the irradiation light are lowered to make the sleeping person feel the morning natural atmosphere and sleep. An operation of guiding to become shallower becomes possible. In addition, after waking up, by increasing both the illuminance when illuminating the sleeping person with the irradiation light and the color temperature of the irradiation light, an operation of prompting the sleeping person to wake up becomes possible. This makes it possible for the sleeping person to smoothly wake up in the morning.

  Furthermore, as described above, the wake-up program that is the lighting program in the lighting device 1 of the present embodiment has a low color temperature of the light emitted from the light source 6 within the range of the color temperature controlled by the wake-up program (in the lighting program). Dimming circuit unit 2 so that the light intensity of light source 6 and the transmittance of liquid crystal filter unit 3 with respect to light having a low color temperature are inversely proportional to each other when the color temperature is controlled within a range of color temperature controlled by a certain wake-up program. And the toning circuit unit 4 is programmed to be controlled. Therefore, according to the illuminating device 1, when the light intensity of the light source 6 is lowered, the transmittance of the liquid crystal filter unit 3 is increased, so that irradiation light with low illuminance and color temperature for illuminating the bedridden can be irradiated. When the luminous intensity of the light source 6 is increased, the transmittance of the liquid crystal filter unit 3 is decreased, so that it is possible to irradiate irradiation light with high illuminance and color temperature to illuminate the sleeper. Thereby, according to the illuminating device 1 of this embodiment, when the light source 6 with the low color temperature of the emitted light is used, there exists an effect that the color temperature of irradiation light can be changed in a wide range.

(Embodiment 2)
The illuminating device 10 of this embodiment has a function as a wake-up device similarly to the illuminating device 1 of the embodiment, and as shown in FIG. 7, it adjusts the light source 60 composed of a discharge lamp (for example, a fluorescent lamp). The light control circuit portion 20 for light control and a nematic liquid crystal having a dichroic dye are formed on the optical axis of the light source 60, and light having a predetermined color temperature according to the applied voltage (this embodiment) In the embodiment, a liquid crystal filter unit 30 whose transmittance of mainly a high color temperature, that is, light having a short wavelength in the visible region, and a toning circuit unit 40 that controls an AC voltage applied to the liquid crystal filter unit 30 are provided. The lighting control unit 50 controls the dimming circuit unit 20 and the toning circuit unit 40 in accordance with a preset program.

  As shown in FIG. 8, the dimming circuit unit 20 generates a high-frequency voltage for driving the light source 60 based on the power circuit unit 20a that converts the AC power source AC into a DC power source and the DC power source that the power circuit 20a outputs. And an inverter circuit 20b.

  As shown in FIG. 8, the power supply circuit 20a includes a diode bridge DB2 having input terminals connected to both ends of an AC power supply AC such as a commercial power supply, and a choke for a boost chopper connected between output terminals of the diode bridge DB2. Between a series circuit of an inductor L5 made of a coil and a switching element Q10, a step-up chopper circuit made up of a diode D2 having an anode connected to a connection point between the inductor L5 and the switching element Q1, and between the cathode of the diode D2 and the ground A smoothing capacitor C8 and a switching control unit SC4 are connected. In the power supply circuit 20a, when the switching element Q10 is on, a current flows through the path of the AC power supply AC, the diode bridge DB2, the inductor L5, the switching element Q10, the diode bridge DB2, and the AC power supply AC, and the switching element Q10 is turned off. Occasionally, current flows through the path of the AC power supply AC, the diode bridge DB2, the inductor L5, the diode D1, the capacitor C8, the diode bridge DB2, and the AC power supply AC, and is stored in the inductor L5 when the switching element Q10 is turned on. The voltage generated in the capacitor C8 increases by the amount of energy. The step-up chopper circuit is well known in the art and will not be described in detail.

  Therefore, according to the power supply circuit 20a, the output voltage of the boost chopper circuit can be set to a desired value by adjusting the on-duty of the switching element Q10 by the switching controller SC4. Is output to the inverter circuit 20b.

  On the other hand, as shown in FIG. 8, the inverter circuit 20b is connected in parallel to a series circuit including switching elements Q11 and Q12 and a resistor R4 connected in parallel to the capacitor C8, and a series circuit of the switching element Q12 and the resistor R4. Parallel to a series circuit composed of a DC cut capacitor C9, a filament preheating capacitor C10, and a primary winding N10 of a filament preheating transformer TR2, and a series circuit of a capacitor C10 and a primary winding N10 of the transformer TR2. A series circuit of a resonance inductor L6 and a resonance capacitor C11 connected to each other and a switching control unit SC4 are included. The inverter circuit 20b is connected between the one secondary winding N21 of the transformer TR2 connected in series between one filament 60a of the light source 60 and the resonance capacitor C12 and the other filament 60b of the light source 60. The other secondary winding N22 of the transformer TR2 connected in series and the series circuit of the resonance capacitor C13 are connected. The light source 60 is connected between both ends of the capacitor C11. An electric current can be supplied.

  Therefore, according to the inverter circuit 20b, when the switching elements Q11 and Q12 are turned on / off by the switching controller SC4, a high-frequency voltage is generated based on the output voltage obtained from the power supply circuit 20a, thereby turning on the light source 60. Can be made.

Furthermore, the inverter circuit 20b has a dimming control unit that controls the frequency of the high-frequency voltage applied to the light source 60 based on the source voltage of the switching element Q12. The dimming control unit includes the switching element Q12 and the dimming control unit. A resistor R5 having one end connected to a connection point with the resistor R4, and a control signal S4 of an illumination control unit 50 (to be described later) having the other end of the resistor R5 connected to the inverting input terminal and providing a reference of the dimming level to the inverting input terminal. , The parallel circuit composed of the resistor R6 and the capacitor C14 connected between the output terminal and the non-inverting input terminal of the operational amplifier OP, and the resistor R7 whose one end is connected to the output terminal of the operational amplifier OP. A diode D3 having a cathode connected to the other end of the resistor R7 and an anode connected to the switching control unit SC4; A resistor R8 connected between und, and a switching control unit SC4. That is, the dimming control unit compares the voltage of the control signal S4 input to the inverting input terminal of the operational amplifier OP with the voltage input to the non-inverting input terminal, and outputs the comparison result to the switching control unit SC4. It is supposed to be. The switching controller SC4 is configured to control the on / off of each switching element Q10, Q11, Q12 based on the above comparison result, whereby the voltage value and frequency of the high-frequency voltage supplied to the light source 60 are set. Thus, the light source 60 can be turned on at a desired luminous intensity. Therefore, according to the dimming circuit unit 20 configured as described above, the control signal S4 input to the inverting input terminal of the operational amplifier OP. Thus, dimming control of the light source 60 can be performed.

  The liquid crystal filter unit 30 is a yellow liquid crystal formed by using a nematic liquid crystal having a dichroic dye that absorbs light of a short wavelength and decreases a color temperature as a dichroic dye whose light absorptance changes depending on molecular orientation. It is a filter. Here, as the dichroic dye that absorbs light of a short wavelength and decreases the color temperature, a dichroic dye that is soluble in the nematic liquid crystal 3b is desirable. For example, an azo dye is suitable. The liquid crystal filter unit 30 has the same configuration as the liquid crystal filter unit 3 of the first embodiment except that the type of dichroic dye is different. Description is omitted.

  Hereinafter, the transmittance characteristic of the liquid crystal filter unit 30 will be described with reference to FIG. First, when no AC voltage is applied to the liquid crystal filter section 30, the dye molecules of the dichroic dye are aligned parallel to the incident polarized light together with the liquid crystal molecules of the nematic liquid crystal (homogeneous alignment), and at this time, the elongated dichroism Since the axis of the dye molecule is parallel to the polarized light, light of a short wavelength is absorbed as shown by the graph Y1 in FIG. 9 according to the characteristics of the dichroic dye. When an alternating voltage is applied to the liquid crystal filter section 30 from this state, the dye molecules are aligned in the direction of the electric field along with the liquid crystal molecules, thereby eliminating the absorption. As a result, as shown by the graph Y2 in FIG. When the rate decreases (in other words, the transmittance increases) and the voltage value of the AC voltage applied to the liquid crystal filter unit 30 exceeds a predetermined value, as shown by a graph Y3 in FIG. It hardly absorbs light and has a transmittance of about 100% for light of almost all wavelengths.

  On the other hand, when an alternating voltage having a voltage value of about 15 V or more and a frequency of several hundred Hz to several kHz is applied to the liquid crystal filter unit 30, for example, the time during which the dye molecules can be sufficiently aligned in the electric field direction together with the liquid crystal molecules Therefore, the light absorptance decreases, and as shown by the graph Y3 in FIG. 9, light of short wavelengths is hardly absorbed. When the frequency of the AC voltage is increased from this state, the time for which the AC voltage is continuously applied decreases, so that the dye molecules are not sufficiently oriented in the electric field direction, resulting in an increase in light absorption. Then (in other words, the transmittance decreases), when the frequency is about several kHz to several hundred kHz, most of the light having a short wavelength is absorbed as shown by a graph Y1 in FIG.

  As described above, the liquid crystal filter unit 30 has a light absorption rate (light transmittance) that varies depending on the magnitude of the voltage value of the applied AC voltage and the frequency of the AC voltage. Specifically, the liquid crystal filter unit 30 reduces the absorptance for short wavelength light if the voltage value of the applied AC voltage is large, and reduces the short wavelength light if the voltage value of the applied AC voltage is small. If the frequency of the applied AC voltage is high, the absorption rate for short-wavelength light is increased. If the frequency of the applied AC voltage is low, the absorption rate for short-wavelength light is increased. Will be reduced.

  The toning circuit unit 40 is for adjusting the transmittance (absorption rate) of the liquid crystal filter unit 30 by applying an AC voltage having a predetermined voltage value and frequency to the liquid crystal filter unit 30. Embodiment 1 Similarly to the toning circuit portion 4, the power supply circuit 40 a and the inverter circuit 40 b are included. Since the power supply circuit 40a and the inverter circuit 40b can be the same as the power supply circuit 4a and the inverter circuits 4b and 4c of the first embodiment, description thereof is omitted in this embodiment.

  Therefore, according to the toning circuit unit 40 of the present embodiment, the transmittance of the liquid crystal filter unit 30 is set to a desired value by adjusting the voltage value and frequency of the AC voltage applied to the liquid crystal filter unit 30. be able to.

  As shown in FIG. 7, the illumination control unit 50 includes a control unit 50 a composed of a microcomputer or the like, and a storage unit 50 b in which an illumination program that is a program for dimming and toning control of the lighting device 10 is stored. In addition, a clock unit 5c, a display unit 5d, and an operation unit 5e similar to those in the first embodiment are included.

  The control unit 50a outputs the control signal S4 that gives the dimming level reference to the dimming circuit unit 20 according to the illumination program stored in the storage unit 50b, and also supplies the liquid crystal filter unit 30 to the toning circuit unit 40. The control signal S2 and S3 for controlling the transmittance of the light is output, thereby having an automatic control function for controlling the light control circuit unit 20 and the color control circuit unit 40. Further, the control unit 50a outputs control signals S2 to S4 according to the input of the operation unit 5e, and has a manual control function for controlling the dimming circuit unit 20 and the toning circuit unit 40, as well as the operation unit 5e. A function for setting and correcting the current time according to the input, a function for counting the current time according to the clock unit 5c, a function for displaying the current time on the display unit 5d, and a setting of the wake-up time according to the input of the operation unit 5e. It has necessary functions as a wake-up device, such as a function for performing correction and the like.

  The storage unit 50b is a storage device such as a RAM, and stores a lighting program for controlling the light control circuit unit 20 and the color adjustment circuit unit 40 by the control unit 50a. Here, an example of the lighting program is a wake-up program similar to that of the first embodiment, and the wake-up program of the present embodiment will be described in detail below.

  As shown in FIG. 6A, the wake-up program of the present embodiment is a predetermined time before the time t3 that is the wake-up time (or the time immediately before one minute before that) input by the operation unit 5e (for example, A low illuminance period T1 that is a period from a time t1 (30 minutes to 60 minutes before) to a time t2 that is a predetermined time before the time t3 (for example, 5 minutes to 10 minutes before), and a period from the time t2 to the time t3 The operation of the lighting device 1 (the operation of the control unit 5a) is divided into three periods of a certain middle illuminance period T2 and a high illuminance period T3 that is a period from the time t3 to a predetermined time (for example, the operation end time of the wake-up program). ), The illuminance by the irradiation light is changed as indicated by a in FIG. 6A, and the color temperature of the irradiation light is changed as indicated by c in FIG. 6A. Has been.

  Here, the low illuminance period T1 is a period for causing the sleeper to feel the morning atmosphere in the morning before and after sunrise (dawn) by the lighting device 1, and the wake-up program counts the current time counted using the clock unit 5c. At time t1, the control unit 50a outputs a control signal S4 to start lighting the light source 60, and thereafter, at time t2, until the illuminance by the irradiated light becomes Lx1 (for example, 250 lx or less), The control signal S4 is output to the control unit 50a so as to gradually increase the luminous intensity. Further, in the low illumination period T1, in order to produce light before and after sunrise, for example, about 40 minutes after sunrise to 1 hour after sunrise, the wake-up program gradually increases the color temperature of the irradiation light. The control unit 50a is caused to output control signals S2 and S3 so that the color temperature is set to 3000K at t1, and the color temperature is gradually increased to set the color temperature to 4000K at time t2.

  Incidentally, the light source 60 used in the present embodiment is a fluorescent lamp having a color temperature of radiated light of 5000K as shown in FIG. 6B, and within the range of the color temperature controlled by the wake-up program that is an illumination program. Since it is high (the maximum value within the range of the color temperature controlled by the wake-up program, which is a lighting program), the wake-up program is proportional to the light intensity of the light source 60 and the transmittance of the liquid crystal filter unit 30 for light with a high color temperature. Thus, the light control circuit unit 20 and the color adjustment circuit unit 40 are set to be controlled. Therefore, the liquid crystal filter unit 30 is controlled so that the transmittance becomes the lowest at time t1 and gradually increases as the time approaches t2.

  The medium illuminance period T2 is a period for making the sleeper feel the natural atmosphere in the morning after sunrise. The wake-up program determines the luminous intensity of the light source 60 until the illuminance by the irradiation light becomes Lx2 (for example, about 500 lx to 1000 lx). The control signal S4 is output from the control unit 50a so as to increase the value. In the middle illuminance period T2, the wake-up program controls the control unit 50a to maintain the color temperature set in the low illuminance period T1, that is, to maintain the state where the color temperature of the irradiation light is 4000K. S2 and S3 are output. Therefore, in the medium illuminance period T2, the transmittance of the liquid crystal filter unit 30 is kept substantially constant.

  The high illuminance period T3 is a period for causing a person to feel the natural atmosphere from sunrise to noon, that is, after the sunrise, and the wakeup program sets the illuminance by irradiation light to Lx3 (for example, 2000 lx or more). The control unit 50a is caused to output the control signal S4 so as to increase the luminous intensity of the light source 60 until it becomes. Further, in the high illumination period T3, in order to produce light at about 3:00 pm, the wake-up program gradually increases the color temperature of the irradiation light, specifically, the color temperature of the irradiation light becomes 5000K. The control unit 50a outputs control signals S2 and S3. Therefore, in this high illuminance period T3, since the light from the light source 60 is irradiated as it is, the transmittance of the liquid crystal filter unit 3 is set to be the highest.

  Then, after passing through the high illuminance period T3, the wake-up program ends the operation, and thereby the light source 60 is turned off.

  Therefore, according to the wake-up program described above, the illuminating device 10 irradiates the sleeping person with irradiation light having a low light output and color temperature in the low illuminance period T1, as shown in FIG. The sleeper feels an atmosphere close to the natural world, and encourages the sleeper to sleep shallowly in the subsequent medium illuminance period T2, and the light output and color temperature are high in the subsequent high illuminance period T3. By irradiating the sleeper, the sleeper is urged to wake up. This makes it possible for the sleeping person to smoothly wake up in the morning.

  The lighting device 10 includes the light control circuit unit 20, the liquid crystal filter unit 30, the color control circuit unit 40, and the illumination control unit 50 described above.

  And according to the illuminating device 10 of this embodiment, while the light control circuit part 20 can set the luminous intensity of the light source 60 to a desired value, the color control circuit part 40 adjusts the transmittance | permeability of the liquid crystal filter part 30. Since the color temperature of the irradiated light can be set to a desired value, it is possible to individually control the light intensity and the color temperature of the irradiated light. In addition, when the user wakes up, control can be performed to increase the luminous intensity and color temperature of the irradiation light, and as a result, a wide range of illumination control can be performed. Moreover, according to the illuminating device 10, since the light intensity and color temperature of irradiation light can be individually controlled as described above, the wake-up time input by the operation unit 5e (or one minute before that, etc.) according to the wake-up program described above. Before the time), the illuminance when illuminating the sleeping person with the irradiation light and the color temperature of the irradiation light are both lowered so that the sleeping person feels the atmosphere of the natural world in the morning and the sleep becomes shallow. After the wake-up time, by increasing both the illuminance when illuminating the sleeping person with the irradiation light and the color temperature of the irradiation light, it becomes possible to urge the sleeping person to wake up. It is possible to get up in the morning smoothly.

  Furthermore, as described above, the wake-up program that is a lighting program in the lighting device 10 of the present embodiment has a high color temperature of light emitted from the light source 60 within the range of the color temperature controlled by the wake-up program (in the lighting program). The light intensity of the light source 60 and the transmittance of the liquid crystal filter unit 30 with respect to light having a high color temperature are proportional to each other when the color temperature is within the range of the color temperature controlled by a certain wake-up program. And the toning circuit section 40 is controlled. Therefore, according to the illuminating device 10, when the luminous intensity of the light source 60 is lowered, the transmittance of the liquid crystal filter unit 30 is lowered, so that irradiation light with low illuminance and color temperature for illuminating the bedridden can be irradiated. When the luminous intensity of the light source 60 is increased, the transmittance of the liquid crystal filter unit 30 is increased, so that it is possible to irradiate irradiation light with high illuminance and color temperature to illuminate the sleeper. Thereby, according to the illuminating device 10 of this embodiment, when the light source 60 with the high color temperature of the emitted light is used, there exists an effect that the color temperature of irradiation light can be changed in a wide range.

(Embodiment 3)
The illuminating device 11 of this embodiment has a function as a wake-up device like the illuminating devices 1 and 2 of the embodiment, and as shown in FIG. 10, a light source 60 composed of a discharge lamp (for example, a fluorescent lamp). Is formed using a dimming circuit unit 20 for dimming control and a nematic liquid crystal having a dichroic dye, and is disposed on the optical axis of the light source 60 and has a low color temperature according to an applied voltage (visible light). Liquid crystal having a blue liquid crystal filter 31A in which the transmittance of light having a long wavelength in the region changes) and a yellow liquid crystal filter 31B in which the transmittance of light having a high color temperature (light having a short wavelength in the visible region) changes according to the applied voltage. Filter unit 31, toning circuit units 41A and 41B for controlling the AC voltages applied to the filters 31A and 31B of the liquid crystal filter unit 31, respectively, and a dimming circuit according to a preset program Parts 20 and toning circuit section 41A, and a lighting control section 51 for controlling 41B. The dimming circuit unit 20 is the same as that of the second embodiment, and thus the description thereof is omitted in this embodiment.

  The liquid crystal filter unit 31 is configured by superposing two liquid crystal filters, a blue liquid crystal filter 31A and a yellow liquid crystal filter 31B. Here, the blue liquid crystal filter 31A is an anthraquinone that absorbs light of a long wavelength and increases the color temperature as a dichroic dye whose light absorption rate changes due to molecular orientation, as in the liquid crystal filter portion 3 of the first embodiment. A liquid crystal filter for high illuminance configured to change transmittance with respect to light having a low color temperature using a nematic liquid crystal having a pigment, and the transmittance characteristics thereof are as described in the first embodiment. is there. On the other hand, the yellow liquid crystal filter 31B has a high color temperature using a nematic liquid crystal having an azo dye as a dichroic dye whose light absorptance changes depending on molecular orientation, like the liquid crystal filter section 30 of the second embodiment. This is a low illuminance liquid crystal filter configured to change its transmittance with respect to light, and its transmittance characteristic is as described in the second embodiment.

  Therefore, the liquid crystal filter unit 31 has a light absorptivity (light intensity) depending on the magnitude of the voltage value of the alternating voltage applied to the blue liquid crystal filter 31A and the yellow liquid crystal filter 31B and the frequency of the alternating voltage. (Transmissivity) is changed. Specifically, if the voltage value of the alternating voltage applied to the blue liquid crystal filter 31A is large, the liquid crystal filter unit 31 has a reduced absorption rate for light having a long wavelength, and if the voltage value of the applied alternating voltage is small. When the frequency of the applied AC voltage is high, the absorption rate of the long wavelength light is increased. When the frequency of the applied AC voltage is low, the absorption of the long wavelength light is increased. The absorptance with respect to light will decrease.

  On the other hand, if the voltage value of the alternating voltage applied to the yellow liquid crystal filter 31B is large, the liquid crystal filter unit 31 has a reduced absorption factor for light having a short wavelength, and if the voltage value of the applied alternating voltage is small, the short wavelength. If the frequency of the applied AC voltage is high, the absorption rate of the short wavelength light is increased. If the frequency of the applied AC voltage is low, the absorption of the short wavelength light is increased. The rate will decrease.

  Furthermore, according to such a liquid crystal filter unit 31, it is possible to increase the transmittance for all wavelengths in the visible region by increasing both the transmittances of both the liquid crystal filters 31A and 31B. If both the transmittances of 31B are reduced, the transmittance for all wavelengths in the visible region can be reduced.

  The toning circuit unit 41A is for adjusting the transmittance (absorption rate) of the liquid crystal filter unit 31 by applying an AC voltage having a predetermined voltage value and frequency to the blue liquid crystal filter 31A of the liquid crystal filter unit 31. There is a power supply circuit 40a and an inverter circuit 40b similar to those of the second embodiment. In the present embodiment, the toning circuit unit 41A is configured such that the power supply circuit 40a is controlled by a control signal S2A described later output from the control unit 51a, and the inverter circuit 40b is controlled by a control signal S3A described later. Yes.

  On the other hand, the toning circuit unit 41B applies an alternating voltage having a predetermined voltage value and frequency to the yellow liquid crystal filter 31B of the liquid crystal filter unit 31, thereby adjusting the transmittance (absorption rate) of the liquid crystal filter unit 31. The power supply circuit 40a and the inverter circuit 40b are provided similarly to the toning circuit portion 41A. In the present embodiment, the toning circuit unit 41B is configured such that the power supply circuit 40a is controlled by a control signal S2B described later output from the control unit 51a, and the inverter circuit 40b is controlled by a control signal S3B described later. .

  The operation of the toning circuit units 41A and 41B is the same as that of the toning circuit unit 4 described in the first embodiment, and thus the description thereof is omitted in this embodiment.

  As shown in FIG. 10, the illumination control unit 51 includes a control unit 51a composed of a microcomputer or the like, and a storage unit 51b in which an illumination program that is a program for dimming and toning control of the lighting device 11 is stored. In addition, a clock unit 5c, a display unit 5d, and an operation unit 5e similar to those in the first embodiment are included.

  In accordance with the illumination program stored in the storage unit 51b, the control unit 51a sends a control signal S4 that gives a reference of the dimming level to the dimming circuit unit 20, and the blue liquid crystal filter 31A of the liquid crystal filter unit 31 to the toning circuit unit 41A. Control signals S2A and S3A for controlling the transmittance of the liquid crystal, and control signals S2B and S3B for controlling the transmittance of the yellow liquid crystal filter 31B of the liquid crystal filter unit 31 to the toning circuit unit 41B, respectively. The light control circuit unit 20 and the color adjustment circuit units 41A and 41B have an automatic control function. Further, the control unit 51a outputs control signals S2A, S2B, S3A, S3B, and S4 according to the input of the operation unit 5e, and controls the dimming circuit unit 20 and the toning circuit units 41A and 41B. In addition to the above, the function of setting and correcting the current time according to the input of the operation unit 5e, the function of counting the current time according to the clock unit 5c, the function of displaying the current time on the display unit 5d, and the function of the operation unit 5e It has necessary functions as a wake-up device, such as a function for setting and correcting the wake-up time according to the input.

  The storage unit 51b is a storage device such as a RAM, and stores an illumination program for controlling the light control circuit unit 20 and the color adjustment circuit units 41A and 41B by the control unit 51a. Here, the lighting program is a wake-up program similar to that of the first embodiment, and the wake-up program of the present embodiment will be described in detail below.

  As shown in FIG. 6A, the wake-up program of the present embodiment is a predetermined time before the time t3 that is the wake-up time (or the time immediately before one minute before that) input by the operation unit 5e (for example, A low illuminance period T1 that is a period from a time t1 (30 minutes to 60 minutes before) to a time t2 that is a predetermined time before the time t3 (for example, 5 minutes to 10 minutes before), and a period from the time t2 to the time t3 The operation of the lighting device 1 (the operation of the control unit 5a) is divided into three periods of a certain middle illuminance period T2 and a high illuminance period T3 that is a period from the time t3 to a predetermined time (for example, the operation end time of the wake-up program). ), The illuminance by the irradiation light is changed as indicated by a in FIG. 6A, and the color temperature of the irradiation light is changed as indicated by c in FIG. 6A. Has been.

  Here, the low illuminance period T1 is a period for causing the sleeper to feel the morning atmosphere in the morning before and after sunrise (dawn) by the lighting device 1, and the wake-up program counts the current time counted using the clock unit 5c. At time t1, the control unit 51a outputs a control signal S4 to start lighting the light source 60. After that, until the illuminance by the irradiation light becomes Lx1 (for example, 250 lx or less) at time t2, The control unit 51a is caused to output a control signal S4 so that the luminous intensity is gradually increased. Further, in the low illumination period T1, in order to produce light before and after sunrise, for example, about 40 minutes after sunrise to 1 hour after sunrise, the wake-up program gradually increases the color temperature of the irradiation light. The control unit 51a outputs the control signals S2A, S3A, S2B, and S3B so that the color temperature is set to 3000K at t1 and the color temperature is gradually increased to set the color temperature to 4000K at time t2.

  By the way, the light source 60 used in this embodiment is a fluorescent lamp whose color temperature of emitted light is about 5000 K as described in the second embodiment. The dimming circuit unit 20 and the toning circuit units 41A and 41B are set so as to be proportional to the transmittance of the liquid crystal filter unit 31 with respect to high light (in other words, the transmittance of the yellow liquid crystal filter 31B). ing. Therefore, the liquid crystal filter unit 31 is controlled so that the transmittance of the yellow liquid crystal filter 31B becomes the lowest at time t1, and the transmittance of the yellow liquid crystal filter 31B gradually increases as it approaches time t2. Further, the liquid crystal filter unit 31 is controlled so that the transmittance of the blue liquid crystal filter 31A becomes the highest during the low illuminance period T1.

  The medium illuminance period T2 is a period for making the sleeper feel the natural atmosphere in the morning after sunrise. The wake-up program determines the luminous intensity of the light source 60 until the illuminance by the irradiation light becomes Lx2 (for example, about 500 lx to 1000 lx). The control signal 51 is output from the control unit 51a so as to increase the control signal. Further, in the middle illuminance period T2, the wake-up program controls the control unit 51a to maintain the color temperature set in the low illuminance period T1, that is, to maintain the state where the color temperature of the irradiation light is about 4000K. Signals S2A, S3A, S2B, and S3B are output. Therefore, the transmittance of each of the filters 31A and 31B of the liquid crystal filter unit 31 is kept substantially constant during the medium illuminance period T2.

  The high illuminance period T3 is a period for causing a person to feel the natural atmosphere from sunrise to noon, that is, after the sunrise, and the wakeup program sets the illuminance by irradiation light to Lx3 (for example, 2000 lx or more). The control unit 51a is caused to output the control signal S4 so that the luminous intensity of the light source 60 is increased until it becomes.

  In addition, in the high illumination period T3, the wake-up program gradually increases the color temperature of the irradiation light in order to produce light at about 3:00 pm. Specifically, the color temperature of the irradiation light becomes 5000K or higher. Then, the control unit 51a is caused to output control signals S2A, S3A, S2B, and S3B.

  Here, since the color temperature of the light source 60 is about 5000K as described above, the light from the light source 60 may be irradiated as it is until the color temperature of the irradiation light reaches 5000K. In this case, the liquid crystal filter unit 31 The yellow liquid crystal filter 31B is controlled to have the highest transmittance. Then, after the color temperature of the irradiation light reaches 5000K, the liquid crystal filter unit 31 absorbs long wavelength light and increases the color temperature of the irradiation light by reducing the transmittance of the blue liquid crystal filter 31A. To be controlled.

  That is, in the present embodiment, as the liquid crystal filter unit 31, in addition to the yellow liquid crystal filter 31B that lowers the color temperature, the blue liquid crystal filter 31A that increases the color temperature is used. In contrast, the color temperature of the irradiation light can be increased to 5000 K or higher, which is the color temperature of the light source 60, and a wider range of illumination control than in the second embodiment can be performed.

  Then, after passing through the high illuminance period T3, the wake-up program ends the operation, and thereby the light source 60 is turned off.

  Therefore, according to the wake-up program described above, as shown in FIG. 6A, the lighting device 11 irradiates a sleeping person with irradiation light having a low light output and color temperature in the low illuminance period T1, so that The sleeper feels an atmosphere close to the natural world, and encourages the sleeper to sleep shallowly in the subsequent medium illuminance period T2, and the light output and color temperature are high in the subsequent high illuminance period T3. By irradiating the sleeper, the sleeper is urged to wake up. This makes it possible for the sleeping person to smoothly wake up in the morning. In addition, unlike a general wake-up device, the sleeper is urged to wake up before making an unpleasant sound, so that it is possible to suppress the person from feeling uncomfortable when getting up.

  The lighting device 11 includes the light control circuit unit 20, the liquid crystal filter unit 31, the color control circuit units 41A and 41B, and the illumination control unit 51 described above.

  And according to the illuminating device 11 of this embodiment, while exhibiting the effect similar to Embodiment 2, the liquid crystal filter part 31 was comprised so that the transmittance | permeability might change with respect to light with low color temperature. Since it is composed of a blue liquid crystal filter 31A, which is a liquid crystal filter for illuminance, and a yellow liquid crystal filter 31B, which is a liquid crystal filter for low illuminance, configured to change the transmittance with respect to light having a high color temperature. By reducing the transmittance of the liquid crystal filter 31A, the color temperature of the irradiated light can be made higher than the color temperature of the light source 60, and by reducing the transmittance of the yellow liquid crystal filter 31A, the color temperature of the irradiated light can be reduced. Therefore, the color temperature can be changed in a wide range around the color temperature peculiar to the light source 60.

  In the illumination device 11 of the present embodiment, a fluorescent lamp is used as the light source 60. However, the light source 60 has a substantially flat continuous spectrum such as a xenon discharge lamp so that the color temperature can be controlled over a wide range. Metal halide discharge lamps are useful. That is, if the light source has a flat spectral characteristic, the light absorption loss when the color temperature is increased or decreased can be minimized.

(Embodiment 4)
As shown in FIG. 11, the illumination device 12 of the present embodiment is characterized by the configuration of the illumination control unit 52, and the other configurations are the same as those of the illumination device 10 of the second embodiment, and the same configuration is the same. The description is abbreviate | omitted and attached | subjected.

  As shown in FIG. 11, the illumination control unit 52 includes a control unit 52a composed of a microcomputer or the like, a storage unit 50b in which an illumination program, which is a program for dimming and toning control of the lighting device 10, is stored, a clock It includes a unit 5c, a display unit 5d, an operation unit 5e, and a light receiving unit 5f that receives an infrared signal transmitted from a transmitter RC such as a remote controller.

  Here, the transmitter RC is an input device for executing, for example, turning on / off the light source 60, adjusting the brightness of the irradiated light, adjusting the color temperature of the irradiated light, and turning on / off the operation of the illumination program. (Not shown) and a transmission unit (not shown) for transmitting an infrared signal corresponding to the control content input by the input device.

  The control unit 52a outputs the control signal S4 that gives the dimming level reference to the dimming circuit unit 20 in accordance with the illumination program stored in the storage unit 50b, and the liquid crystal filter unit 30 to the toning circuit unit 40. The control signal S2 and S3 for controlling the transmittance of the light is output, thereby having an automatic control function for controlling the light control circuit unit 20 and the color control circuit unit 40. Further, the control unit 50a outputs control signals S2 to S4 according to the input of the operation unit 5e, and has a manual control function for controlling the dimming circuit unit 20 and the toning circuit unit 40, as well as the operation unit 5e. A function for setting and correcting the current time according to the input, a function for counting the current time according to the clock unit 5c, a function for displaying the current time on the display unit 5d, and a setting of the wake-up time according to the input of the operation unit 5e. It has necessary functions as a wake-up device, such as a function for performing correction and the like.

  Further, in the present embodiment, the control unit 52a outputs the control signals S2 to S4 according to the control content of the infrared signal received by the light receiving unit 5f, and controls the dimming circuit unit 20 and the toning circuit unit 40. For example, the transmitter 60 can be used to turn on / off the light source 60, adjust the luminous intensity of the irradiation light, adjust the color temperature of the irradiation light, and turn on / off the operation of the illumination program. This can be done by operating the RC input device.

  According to the illuminating device 12 of the present embodiment described above, the illuminating device 12 can be remotely controlled by using the transmitter RC in addition to the effects of the second embodiment. It is possible to smoothly turn on / off the light, adjust the intensity of the irradiation light, adjust the color temperature of the irradiation light, turn on / off the operation of the illumination program, and the like.

  Needless to say, the configuration of the present embodiment can be applied not only to the second embodiment but also to other embodiments.

(Embodiment 5)
In recent years, a hormone called melatonin, which is secreted from the pineal gland of human brain, has a deep connection with human sleep. It turns out that people tend to feel less sleepy when they get fewer. Melatonin is known to be secreted in the dark (that is, in a state where the amount of light incident on the retina is small), and conversely, it is suppressed in a bright place, and is particularly blue with a wavelength of 460 nm as the center. The result shows that the secretion of melatonin is effectively suppressed by light.

  The lighting device of the present embodiment is made in consideration of the sleep action by melatonin. In addition to the configuration of the lighting device 10 of the second embodiment, a liquid crystal filter unit for suppressing melatonin (not shown) (hereinafter referred to as “melatonin suppression”). And a toning circuit section (hereinafter referred to as “melatonin toning circuit section”) for adjusting the transmittance of a melatonin suppression filter (not shown), and the storage section 50b has a new lighting program. Melatonin suppression program is memorized. In the following description, a specific configuration of the present embodiment will be described, and description of the same configuration as that of the illumination device 10 of the second embodiment will be omitted.

  Here, the melatonin suppression filter is a yellow dye formed using a nematic liquid crystal having an azo dye that absorbs short-wavelength light and decreases the color temperature as a dichroic dye whose light absorption rate varies depending on molecular orientation. It is a liquid crystal filter, and is configured so that the transmittance for light having a wavelength near 460 nm can be remarkably lowered by adjusting the amount and type of the dichroic dye. In addition, since such a melatonin suppression filter has the structure similar to the liquid crystal filter part 30 of the said Embodiment 2, it abbreviate | omits description about another structure.

  Hereinafter, the transmittance characteristics of the melatonin suppression filter will be described with reference to FIG. First, when an AC voltage is not applied to the melatonin suppression filter, the dye molecules of the dichroic dye are aligned parallel to the incident polarized light together with the liquid crystal molecules of the nematic liquid crystal (homogeneous alignment). Since the molecular axis is parallel to the polarized light, light of a short wavelength, particularly light having a wavelength in the vicinity of 460 nm, is absorbed according to the characteristics of the dichroic dye, as indicated by a graph Y10 in FIG. When an AC voltage is applied to the melatonin suppression filter from this state, the dye molecules are aligned in the direction of the electric field along with the liquid crystal molecules, and the absorption is eliminated. As a result, as shown by the graph Y20 in FIG. When the absorptance decreases (in other words, the transmittance increases) and the voltage value of the AC voltage applied to the melatonin suppression filter is equal to or higher than a predetermined value, as shown by a graph Y30 in FIG. It hardly absorbs light and has a transmittance of about 100% for light of almost all wavelengths.

  On the other hand, when an alternating voltage with a voltage value of about 15 V or more and a frequency of several hundred Hz to several kHz is applied to the melatonin suppression filter, for example, the time during which the dye molecules can be sufficiently aligned in the electric field direction together with the liquid crystal molecules The increase in the light absorptivity decreases, and as shown by a graph Y30 in FIG. 12, light of short wavelengths is hardly absorbed. When the frequency of the AC voltage is increased from this state, the time for which the AC voltage is continuously applied decreases, so that the dye molecules are not sufficiently oriented in the electric field direction, resulting in an increase in light absorption. In other words (in other words, the transmittance decreases), when the frequency is about several kHz to several hundred kHz, as shown by a graph Y10 in FIG. 12, most of the light having a wavelength near 460 nm is absorbed. Become.

  As described above, the melatonin suppression filter changes the absorption rate (light transmittance) of light having a wavelength near 460 nm depending on the magnitude of the voltage value of the applied AC voltage and the frequency level of the AC voltage. Is. Specifically, the melatonin suppression filter has a reduced absorptance with respect to light having a wavelength near 460 nm if the voltage value of the applied AC voltage is large, and near 460 nm if the voltage value of the applied AC voltage is small. If the absorptivity for light with a wavelength increases and the frequency of the applied AC voltage is high, the absorptance for light with a wavelength near 460 nm increases, and if the frequency of the applied AC voltage is low, the absorptivity for light with a wavelength near 460 nm The absorptance with respect to the light of a wavelength will reduce.

  The toning circuit unit for melatonin is for adjusting the transmittance (absorption rate) of the melatonin suppression filter by applying an AC voltage having a predetermined voltage value and frequency to the melatonin suppression filter. Similar to the toning circuit unit 40, it is composed of a power supply circuit and an inverter circuit. Therefore, according to the toning circuit unit for melatonin, the transmittance of the melatonin suppression filter can be set to a desired value by adjusting the voltage value and frequency of the alternating voltage applied to the melatonin suppression filter. The melatonin toning circuit unit controls the power supply circuit and the inverter circuit by the control signal output from the control unit 50a, as in the toning circuit unit 40 of the second embodiment. .

  The aforementioned melatonin suppression program is stored in the storage unit 50b as an illumination program. This melatonin suppression program is an illumination program for suppressing or promoting the secretion of melatonin by light stimulation. Specifically, the melatonin secretion is increased or decreased by increasing or decreasing the transmittance at a wavelength near 460 nm by the melatonin suppression filter. It is comprised so that suppression or promotion may be aimed at.

  For example, as shown in FIG. 13, the melatonin suppression program is a predetermined time before the bedtime t30 with respect to the wake-up time t10 and the bedtime t30 (which is set to a time before 0 o'clock) input through the operation unit 5e. In the period Tc from the time t20 (for example, 2 hours before) to the next morning's wake-up time t10, the transmittance of the melatonin suppression filter is lowered to promote the secretion of melatonin in a person. In addition, the melatonin suppression program is configured to suppress human melatonin secretion by increasing the transmittance of the melatonin suppression filter in periods other than the period Tc. The period Tc may be a period from time t20 to 0 o'clock, or the period Tc may be set by a timer or the like.

  Therefore, according to the melatonin suppression program described above, the illuminating device 13 promotes the secretion of melatonin by irradiating the person with the irradiation light in which the light having a wavelength near 460 nm is suppressed in the period Tc. An environment that makes it easy for a person to sleep, and during periods other than the period Tc, irradiates the person with irradiation light that does not suppress light having a wavelength in the vicinity of 460 nm, thereby suppressing the secretion of melatonin, thereby making it easy for the person to wake up Will work to give.

  As described above, according to the illuminating device 13 of the present embodiment, the same effects as those of the second embodiment can be obtained, and by operating according to the melatonin suppression program, it is easy for the person to go to bed at bedtime (easy to fall asleep) In addition to providing an environment, when waking up, it is possible to give a person an environment that is easy to wake up (easy to wake up), and it is possible to allow the person to go to bed and wake up smoothly. In addition, by suppressing and promoting the secretion of melatonin depending on the time zone as described above, it is possible to expect an effect of arranging a human sleep and awakening cycle.

  Note that the melatonin suppression filter, the melatonin toning circuit, and the melatonin suppression program of this embodiment can be employed not only in the second embodiment but also in other embodiments.

(Embodiment 6)
As illustrated in FIG. 14, the illumination device 13 of the present embodiment is characterized by the configuration of the illumination control unit 53, and other configurations are the same as those of the illumination device 11 of the third embodiment. The description is abbreviate | omitted and attached | subjected.

  As shown in FIG. 14, the illumination control unit 53 includes a control unit 53a composed of a microcomputer or the like, a storage unit 53b in which an illumination program that is a program for dimming and toning control of the lighting device 13 is stored, and a clock. It has a unit 5c, a display unit 5d, an operation unit 5e, a brightness sensor 53c, and a temperature sensor 53d.

  Here, the brightness sensor 53c detects the brightness of the room where the lighting device 13 is installed, that is, the illuminance at a predetermined place in the room where the brightness sensor is installed. For example, the light sensor 53c is a light receiving element such as a phototransistor. The illuminance detection value is output to the control unit 53a. On the other hand, the temperature sensor 53d detects an indoor temperature (air temperature) where the lighting device 13 is installed, and includes, for example, a temperature detection element such as a thermistor and outputs a temperature detection value to the control unit 53a. It is configured as follows.

  In accordance with the illumination program stored in the storage unit 53b, the control unit 53a gives a control signal S4 that gives a reference of the dimming level to the dimming circuit unit 20, and the blue liquid crystal filter 31A of the liquid crystal filter unit 31 to the toning circuit unit 41A. Control signals S2A and S3A for controlling the transmittance of the liquid crystal, and control signals S2B and S3B for controlling the transmittance of the yellow liquid crystal filter 31B of the liquid crystal filter unit 31 to the toning circuit unit 41B, respectively. The light control circuit unit 20 and the color adjustment circuit units 41A and 41B have an automatic control function. In addition, the control unit 53a outputs control signals S2A, S2B, S3A, S3B, and S4 according to the input of the operation unit 5e, and controls the dimming circuit unit 20 and the toning circuit units 41A and 41B. In addition to the above, the function of setting and correcting the current time according to the input of the operation unit 5e, the function of counting the current time according to the clock unit 5c, the function of displaying the current time on the display unit 5d, and the function of the operation unit 5e It has necessary functions as a wake-up device, such as a function for setting and correcting the wake-up time according to the input.

  The storage unit 53b is a storage device such as a RAM, and stores a lighting program for controlling the light control circuit unit 20 and the color control circuit units 41A and 41B by the control unit 53a. Here, in addition to the wake-up program similar to that of the third embodiment, the illumination program includes a first sensation temperature adjustment program that adjusts the color temperature of the irradiation light according to the season, and the color temperature of the irradiation light according to the temperature. And a second sensible temperature adjustment program.

  The first sensory temperature adjustment program holds the illuminance detection value of the brightness sensor 53c in association with the detection time, and the lighting device 13 is set based on, for example, time-lapse data of the illuminance detection value for one day. Calculate the length of the period in which the outside light is incident indoors, the sunrise time, the sunset time, etc., and calculate these values and a reference value that is stored in advance (the length of the period in which the outside light is incident, , Reference time values such as sunrise time, sunset time, etc.) to determine whether it is summer or winter. For example, if the calculated sunrise time is earlier than the reference value, it is determined to be summer, and if it is later than the reference data, it is determined to be winter. In addition, you may enable it to input such a reference value using the operation part 5e.

  In addition, when the first sensible temperature adjustment program determines that the current season is summer, the color temperature of the irradiation light is reduced by reducing the transmittance of the blue liquid crystal filter 31A of the liquid crystal filter unit 31. When the current season is determined to be winter, the transmittance of the yellow liquid crystal filter 31B of the liquid crystal filter unit 31 is reduced to lower the color temperature of the irradiation light.

  Therefore, when the lighting device 13 is operated in accordance with the first sensible temperature adjustment program described above, the color temperature of the illuminating light increases when it is determined that it is in summer, thereby giving a cool impression to the person and lowering the sensible temperature. On the other hand, when it is determined that it is winter, the color temperature is lowered, thereby giving a warm impression to a person and raising the body temperature.

  The second sensory temperature adjustment program compares the temperature detected by the temperature sensor 53d with a preset temperature held in advance, and when the temperature detected by the temperature sensor 53d is higher than the preset temperature, the liquid crystal filter unit 31. When the temperature detected by the temperature sensor 53d is lower than the set temperature, the transmittance of the yellow liquid crystal filter 31B of the liquid crystal filter unit 31 is reduced. By lowering, the color temperature of the irradiation light is lowered. When the transmittance is lowered in each of the liquid crystal filters 31A and 31B, it is determined how much the transmittance is to be lowered based on the magnitude of the difference between the temperature detected by the temperature sensor 53d and the set temperature. For example, the transmittance of the blue liquid crystal filter 31A may be lowered as the temperature detected by the temperature sensor 53d is higher than the set temperature. Further, the width of the increase / decrease of the transmittance of each of the liquid crystal filters 31A and 31B may be set freely by the user.

  Therefore, when the lighting device 13 is operated according to the second sensible temperature adjustment program described above, when the temperature detected by the temperature sensor 53d is higher than the set temperature, the color temperature of the irradiation light becomes high, thereby The sensory temperature can be lowered by giving a cool impression. On the other hand, when the temperature detected by the temperature sensor 53d is lower than the set temperature, the color temperature of the irradiating light is lowered. Can be raised.

  In the present embodiment, the operation unit 5e is provided with a key or the like for inputting the set temperature used in the second sensible temperature adjustment program, and the set temperature input by the operation unit 5e is controlled by the control unit 5e. It is sent to the part 53a.

  As described above, according to the illuminating device 13 of the present embodiment, the same effect as that of the illuminating device 11 of the third embodiment can be obtained, the brightness sensor 53c is provided, and the first bodily sensation is provided as an illumination program. Since the temperature adjustment program is provided, the color temperature of the irradiation light increases in the summer, which gives a cool impression to the person and lowers the sensory temperature, and the color temperature decreases in the winter, thereby warming the person The effect of giving an impression and raising the sensible temperature is achieved. In addition, since the lighting device 13 includes the temperature sensor 53d and also includes the second sensory temperature adjustment program as the lighting program, the color of the irradiation light when the temperature detected by the temperature sensor 53d is higher than the set temperature. The temperature increases, thereby giving a cool impression to the person and lowering the sensory temperature. When the temperature detected by the temperature sensor 53d is lower than the set temperature, the color temperature of the irradiated light is lowered, which makes the person warm. The effect of giving an impression and raising the sensible temperature is achieved.

  In addition, in the illuminating device 13 of this embodiment, although both the brightness sensor 53c and the temperature sensor 53d are provided, you may make it provide only any one.

(Embodiment 7)
The illuminating device of the present embodiment is provided with the melatonin suppression filter and the melatonin toning circuit unit described in the above embodiment 5 in the illuminating device 13 of the above embodiment 6, and the storage unit 53b as an illumination program. A new relaxing program is stored. In the following description, a relaxation program, which is a specific configuration of the present embodiment, will be described, and description of configurations similar to those of Embodiments 5 and 6 will be omitted.

  In other words, the relaxing program compares the illuminance detection value of the brightness sensor 53c with a preset setting value, and if the illuminance detection value is equal to or greater than the setting value, the outdoor light is indoors where the lighting device is installed. It is configured to increase the transmittance of the melatonin suppression filter (for example, set to approximately 100%) and to provide an environment that prompts a person to wake up (wake up). In addition, the relaxation program compares the illuminance detection value of the brightness sensor with a preset setting value. If the illuminance detection value is less than the setting value, outside light is indoors where the lighting device is installed. Decide that it is not incident and decrease the transmittance of the melatonin suppression filter (for example, by setting the transmittance to the lowest value) to encourage people to sleep, that is, to provide an environment that encourages people to relax It is configured as follows.

  Therefore, according to the lighting device of the present embodiment, in addition to the same effects as those of the sixth embodiment, when outside light is incident indoors in which the lighting device is installed, the user is awakened (awakened) ), And when the outside light does not enter the room where the lighting device is set, it is possible to provide an environment that encourages relaxation (relaxation). By suppressing and promoting the secretion of melatonin according to the brightness of the room in which the device is set, there is an effect that it is possible to automatically promote human relaxation or arousal.

(Embodiment 8)
By the way, in Embodiment 6 described above, a fluorescent lamp is used as the light source 60. In general, a fluorescent lamp has its light emitted even when an equivalent voltage is applied at the initial lighting and at the end (end of life) lighting. The outputs (luminosity) are different, and the light output at the initial lighting is higher than the light output at the last lighting. Therefore, when dimming control is performed without considering the life of the fluorescent lamp, the illuminance due to the irradiation light of the lighting device may be different between the initial lighting and the final lighting.

  Therefore, the illumination device of the present embodiment is characterized in that, in the illumination device 13 of the above-described Embodiment 6, a constant illuminance program is newly stored in the storage unit 53b as an illumination program. In the following description, a constant illuminance program that is a specific configuration of the present embodiment will be described, and description of the same configuration as that of the sixth embodiment will be omitted.

  That is, the constant illuminance program is configured so that the illuminance obtained by the lighting device is constant regardless of the cumulative lighting time of the light source 60 when a predetermined high-frequency voltage is applied to the light source 60. It is comprised so that 41B may be controlled. For example, the brightness sensor 53c detects the illuminance due to the irradiation light of the illumination device when the light source 60 is turned on by applying a high-frequency voltage of a predetermined value, and the illuminance detection value obtained from the brightness sensor 53c is a set value ( In other words, by increasing or decreasing both the transmittances of the liquid crystal filters 31A and 31B of the liquid crystal filter unit 31 so as to be a value corresponding to the illuminance to be obtained when the predetermined high frequency voltage is applied to the light source 60. The transmittance for light of all wavelengths in the visible region is increased or decreased. In practice, since the light output of the light source 60 decreases with the cumulative lighting time, the above set value is set corresponding to the light output of the light source 60 at the end lighting. Therefore, according to the above constant illuminance program, the transmittance of both the liquid crystal filters 31A and 31B increases in accordance with the cumulative lighting time of the light source 60 (that is, the last stage with respect to the transmittance when the light source 60 is initially turned on). The transmittance during lighting is increased).

  As described above, according to the illumination device of the present embodiment, the same effect as that of the sixth embodiment is obtained, and the light output decrease caused by the cumulative lighting time of the light source 60 is corrected to be equivalent to the light source 60. There is an effect that the illuminance due to the irradiation light of the illumination device when the voltage is applied can be kept substantially constant.

It is a block diagram of the illuminating device of Embodiment 1. FIG. FIG. 3 is a circuit explanatory diagram of a dimming circuit unit according to the first embodiment. (A) is a schematic sectional drawing of the liquid-crystal filter part of Embodiment 1, (b) is a graph which shows the transmittance | permeability with respect to the wavelength of the light in the liquid-crystal filter part of Embodiment 1. FIG. FIG. 3 is a circuit explanatory diagram of a power supply circuit of the toning circuit unit according to the first embodiment. (A) is a circuit explanatory drawing of the inverter circuit of the toning circuit part of Embodiment 1, (b) is a circuit explanatory drawing which shows the other example of an inverter circuit. (A) is operation | movement explanatory drawing of the illuminating device of Embodiment 1, (b) is explanatory drawing which shows the relationship between the natural temperature and the color temperature of a light source. It is a block diagram of the illuminating device of Embodiment 2. FIG. 6 is a circuit explanatory diagram of a dimming circuit unit according to a second embodiment. 6 is a graph showing the transmittance with respect to the wavelength of light in the liquid crystal filter section of the second embodiment. It is a block diagram of the illuminating device of Embodiment 3. It is a block diagram of the illuminating device of Embodiment 4. 10 is a graph showing the transmittance with respect to the wavelength of light in the liquid crystal filter of Embodiment 5. It is operation | movement explanatory drawing of the illuminating device of Embodiment 5. It is a block diagram of the illuminating device of Embodiment 6. It is a block diagram of the conventional illuminating device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lighting apparatus 2 Light control circuit part 3 Liquid crystal filter part 4 Toning circuit part 5 Illumination control part 5a Control part 5b Memory | storage part

Claims (3)

A dimming circuit unit for dimming control of the light source and a nematic liquid crystal having a dichroic dye and disposed on the optical axis of the light source, and a predetermined color temperature according to the applied AC voltage of the liquid crystal filter unit transmittance of light changes, and the liquid crystal filter unit toning circuit section for controlling the AC voltage applied to, the dimming circuit part and the toning circuit section in accordance with a preset lighting program A lighting control unit to control ,
In the illumination program, when the color temperature of light emitted from the light source is low within the range of the color temperature controlled by the illumination program, the light intensity of the light source and the liquid crystal filter for light with a low color temperature The lighting device is a program for controlling the dimming circuit unit and the toning circuit unit so that the transmittance of the unit is inversely proportional . A dimming circuit unit for dimming control of a light source and a nematic liquid crystal having a dichroic dye and disposed on the optical axis of the light source and having a predetermined color temperature according to an applied AC voltage A liquid crystal filter section in which the light transmittance of the liquid crystal filter section changes, a toning circuit section for controlling an AC voltage applied to the liquid crystal filter section, and the dimming circuit section and the toning circuit section according to a preset illumination program. A lighting control unit to control,
The lighting program, the color temperature of the light the light source is radiated, when it is higher in the range of color temperature to be controlled by the lighting program, and intensity of the light source, the liquid crystal filter color temperature for high light as the transmittance is proportional parts, lighting apparatus you being a program for controlling the dimming circuit part and the toning circuit section. The liquid crystal filter unit includes a high-illuminance liquid crystal filter configured to change the transmittance with respect to light having a low color temperature, and a low luminance configured to change the transmittance with respect to light having a high color temperature. The illumination device according to claim 1 , wherein the illumination device is configured with an illuminance liquid crystal filter .

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